1 diffuser + 1 refill + 3 AA batteries. (0.67 US fl oz (20 ml). Transforms natural essential oils into mist (New Air Wick Essential Mist contains natural essential oils that are automatically transformed into a fine mist). 1 refill lasts up 45 day (Based on lowest intensity setting). For Device Features, please see bottom panel. Devices features: A) To change start time - push slider to off, then on at desired time setting. B) Low, med, or high setting control fragrance level. Health. Hygiene. Home. Questions? 1-800-228-4722 (U.S./E.-U.) 1-800-888-0192 (Canada). For ingredient information www.airwick.us/www.airwich.ca. Device made in China. Refill made in Hungary.